The Chapin 4-Gallon 24V Rechargeable Backpack Sprayer (Model 63924) eliminates manual pumping with a 24-volt lithium-ion battery that delivers up to 2 hours of continuous spraying — roughly 58 gallons per charge — at a consistent 35-40 PSI. The durable, translucent poly tank holds 4 gallons and features a wide 6-inch opening for easy filling and cleaning. Whether you're applying fertilizer, herbicide, or pesticide across the lawn and garden, this sprayer keeps steady pressure so you can focus on even coverage instead of hand-pumping.
Chemical-resistant Santoprene seals stand up to professional-grade lawn and garden solutions, while a 3-stage filtration system — filters in the tank, cap, and cushion-grip shut-off — keeps debris from clogging the nozzle. Three included nozzles (adjustable brass cone, adjustable poly cone, and poly fan) let you dial in the right spray pattern via the 20-inch wand and 48-inch reinforced hose. Padded shoulder straps ease fatigue during extended use, and the included charger replenishes the battery in just 3.5-4 hours. Made in the USA and backed by Chapin's 2-year limited warranty.
Detailed specifications for system planning.
| Specification | Details |
|---|---|
| Model / MPN | Chapin 63924 |
| Tank Capacity | 4 Gallons (Translucent Poly) |
| Battery | 24V Lithium-Ion (Rechargeable, Charger Included) |
| Continuous Spray Time | Up to 2 Hours (~58 Gallons per Charge) |
| Recharge Time | 3.5–4 Hours |
| Operating Pressure | 35–40 PSI |
| Filtration | 3-Stage (Tank, Cap Basket, Shut-Off) |
| Seals | Santoprene (Chemical-Resistant) |
| Nozzles Included | Adjustable Brass Cone, Adjustable Poly Cone, Poly Fan |
| Hose / Wand Length | 48" Reinforced Hose / 20" Poly Extension Wand |
| Warranty | 2-Year Limited (Chapin) |
| Origin | Made in the USA (Global Materials) |
| Brand | Chapin |
Step 1: Charge the Battery
Fully charge the included 24V lithium-ion battery using the supplied charger before first use (3.5–4 hours).
Step 2: Fill the Tank
Open the 6-inch wide-mouth cap and fill the tank with water and your chosen fertilizer, herbicide, or pesticide, following the chemical manufacturer's mixing instructions. Never use flammable, caustic, chlorine, or bleach-based solutions in this sprayer.
Step 3: Select a Nozzle
Attach the adjustable brass cone, adjustable poly cone, or poly fan nozzle depending on your desired spray pattern, then power on the pump.
Step 4: Spray
Put on the padded shoulder straps, engage the cushion-grip shut-off to begin spraying, and use the lock-on feature for extended, hands-free application.
Step 5: Clean & Store
After use, rinse the tank, hose, and nozzle with clean water, remove and clean the 3-stage filters, and store the sprayer and battery away from direct sunlight.
How long does the battery last per charge?
The 24V lithium-ion battery provides up to 2 hours of continuous spraying, equal to roughly 58 gallons on a single charge.
Actual runtime will vary slightly depending on nozzle selection and terrain.
How long does it take to recharge?
A full recharge takes approximately 3.5 to 4 hours using the included charger.
We recommend charging the battery fully before storing it for the off-season.
What can I spray with this backpack sprayer?
The Santoprene seals are chemical-resistant, making this sprayer suitable for professional-grade fertilizers, herbicides, and pesticides.
Never spray flammable, caustic, acidic, chlorine, bleach, or other corrosive solutions, per Chapin's Use and Care Manual.
What nozzles are included?
This sprayer ships with three nozzles: an adjustable brass cone, an adjustable poly cone, and a poly fan nozzle.
Switching nozzles lets you match your spray pattern to the task, from targeted weed spot-treatment to broad fertilizer coverage.
Please note the following usage guidelines:
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